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diff --git a/source/mupen64plus-core/src/r4300/macros.h b/source/mupen64plus-core/src/r4300/macros.h
new file mode 100644
index 0000000..80a3f24
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+++ b/source/mupen64plus-core/src/r4300/macros.h
@@ -0,0 +1,90 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *   Mupen64plus - macros.h                                                *
+ *   Mupen64Plus homepage: http://code.google.com/p/mupen64plus/           *
+ *   Copyright (C) 2002 Hacktarux                                          *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef MACROS_H
+#define MACROS_H
+
+#define sign_extended(a) a = (long long)((int)a)
+#define sign_extendedb(a) a = (long long)((signed char)a)
+#define sign_extendedh(a) a = (long long)((short)a)
+
+#define rrt *PC->f.r.rt
+#define rrd *PC->f.r.rd
+#define rfs PC->f.r.nrd
+#define rrs *PC->f.r.rs
+#define rsa PC->f.r.sa
+#define irt *PC->f.i.rt
+#define ioffset PC->f.i.immediate
+#define iimmediate PC->f.i.immediate
+#define irs *PC->f.i.rs
+#define ibase *PC->f.i.rs
+#define jinst_index PC->f.j.inst_index
+#define lfbase PC->f.lf.base
+#define lfft PC->f.lf.ft
+#define lfoffset PC->f.lf.offset
+#define cfft PC->f.cf.ft
+#define cffs PC->f.cf.fs
+#define cffd PC->f.cf.fd
+
+// 32 bits macros
+#ifndef M64P_BIG_ENDIAN
+#define rrt32 *((int*)PC->f.r.rt)
+#define rrd32 *((int*)PC->f.r.rd)
+#define rrs32 *((int*)PC->f.r.rs)
+#define irs32 *((int*)PC->f.i.rs)
+#define irt32 *((int*)PC->f.i.rt)
+#else
+#define rrt32 *((int*)PC->f.r.rt+1)
+#define rrd32 *((int*)PC->f.r.rd+1)
+#define rrs32 *((int*)PC->f.r.rs+1)
+#define irs32 *((int*)PC->f.i.rs+1)
+#define irt32 *((int*)PC->f.i.rt+1)
+#endif
+
+//cop0 macros
+#define Index reg_cop0[0]
+#define Random reg_cop0[1]
+#define EntryLo0 reg_cop0[2]
+#define EntryLo1 reg_cop0[3]
+#define Context reg_cop0[4]
+#define PageMask reg_cop0[5]
+#define Wired reg_cop0[6]
+#define BadVAddr reg_cop0[8]
+#define Count reg_cop0[9]
+#define EntryHi reg_cop0[10]
+#define Compare reg_cop0[11]
+#define Status reg_cop0[12]
+#define Cause reg_cop0[13]
+#define EPC reg_cop0[14]
+#define PRevID reg_cop0[15]
+#define Config reg_cop0[16]
+#define LLAddr reg_cop0[17]
+#define WatchLo reg_cop0[18]
+#define WatchHi reg_cop0[19]
+#define XContext reg_cop0[20]
+#define PErr reg_cop0[26]
+#define CacheErr reg_cop0[27]
+#define TagLo reg_cop0[28]
+#define TagHi reg_cop0[29]
+#define ErrorEPC reg_cop0[30]
+
+#endif
+